oracle trigger tutorial

The document number generated by the oracle trigger and the oracle triggerCreate or replace trigger TRG_KC_SPRK_ IBefore insert on KC_SPRKFOR EACH ROWDECLAREVSCBH varchar2 (40 );ICount NUMBER;IFor number;BEGINSelect t. bhqz into vSCBH from xt_djbhgz t where t.gz id = 8; -- obtain a field of another table as the prefix,

Oracle trigger 3-DDL trigger Oracle trigger 2-DML trigger http://www.bkjia.com/database/201304/200549.html DDL trigger, which is triggered when a DDL statement is executed. Schema trigg

Oracle trigger 2-DML trigger DML trigger is the most common trigger type, developers use more, while other types of triggers are mainly used for database management or audit, while DBA uses more. 1. Introduction to DML triggers: BEFORE triggers are triggered before an operat

is used to grant permissions Noaudit Triggered when audit is disabled through SQL noaudit Rename Triggered when an object is renamed using the SQL RENAME Command Revoke Triggered when the authorization is revoked using the SQL revoke statement Truncate Triggered when a table is truncated using the SQL truncate statement. Available attributes Oracle provides a series of functi

Oracle trigger 4-database event trigger Oracle trigger 3-DDL trigger http://www.bkjia.com/database/201304/201421.html Create database event TRIGGER Syntax 1 CREATE [or replace]

MySQL trigger is only activated by statement. You cannot write two triggers to the same event of the same table. The same event refers to the trigger _ MySQL trigger is only activated by statement. You cannot write two triggers to the same event of the same table. The same event refers to the trigger _ The MySQL

Oracle trigger 5-Instead of trigger Oracle trigger 4-database event trigger http://www.bkjia.com/database/201304/201423.html The Instead of trigger can be used to insert, update, delete

,Username varchar2 (30 ),Error_number number,Sequence number,Timestamp date ); Create or replace trigger error_loggerAfter servererrorOn SchemaDeclare V_errnum number; -- the Oracle Error #V_now Date: = sysdate; -- current time Begin -- For every error in the error stack...For e_counter in 1 .. ora_server_error_depth Loop -- Write the error out to the log table; no-- Commit is required because we a

Speaking of synchronization, in fact, "homework" schedule stored procedures to operate the data, add, delete, change, all in the inside, combined with triggers, cursors to achieve, about job scheduling, using 5 seconds to run a "second-level operation", so basic even faster "synchronization"Do is SQL Server to the Oracle side synchronization, first set up on the SQL Server to the Oracle side of the linked s

Label:createkeyerpselblog fordivaclbody 1CREATEORREPLACETRIGGER trgregisterpregroup2 UPDATE 3 on tblregisterusers 4 for Each ROW 5 ... 6 END Trgregisterpregroup;A trigger is created on table Tblregisterusers, which is a row-level trigger, which can be: old and; New dataHowever, you can no longer select operations on the mutation table, or you will report an exceptionReason:When you create a row

Tags: when end except To_char trigger LDL conf _id for1 CREATE OR REPLACE TRIGGERTrgregisterpregroup2BeforeUPDATE3 ontblregisterusers4 forEach ROW5 6 DECLARE7sort_idvarchar2( -);8E_codeVARCHAR2( +);9 BEGINTen IF: New.fldleftmoney: Old.fldleftmoney Then One SelectTo_char (Systimestamp (3),'YYYYMMDDHH24MISSFF') intosort_id fromdual; AE_code:= NULL; - forRinch(SelectA.fldusergroupid, - A.FLDX, the A.fldy, - A.fldz, - A.fldser

Development and Design of Oracle triggers 1. What is a trigger?A database trigger is a stored PL/SQL block, which is associated with a base table. When a specific database maintenance (insert, delete, update) is performed on the table, implicitly execute a PL/SQL block. Ii. Functions of triggers:. Prevents unauthorized database operations and maintains databas

[Oracle] Chapter 5 cursor and trigger, Chapter 5 oracle cursor Chapter 5 cursor and trigger Cursor: Implicit cursor: % FOUND, % NOTFOUND, % ROWCOUNT 1.% FOUND usage. The % FOUND attribute returns TRUE only when the DML statement affects one or more rows. The following example demonstrates the usage of % FOUND: Begin Up

or Replace package Sys.dbms_standard isProcedure Raise_application_error (Num binary_integer, msg varchar2,function inserting return boolean;function deleting return boolean;function updating return boolean;function updating (Colnam VARCHAR2) return boolean;End For before and after row-level triggers, the property values for the new and: Old objects are the same, primarily for the selection of execution triggers before or after the Oracle constraint

The main contents of this article are as follows:1. Trigger type1.1 DML triggers1.2 Alternative triggers1.3 System triggers2. Trigger composition3. Create a Trigger3.1 Trigger Trigger Order3.2 Creating a DML Trigger3.3 Creating an alternative (INSTEAD of) trigger3.3 Creating a System Event trigger3.4 System

ORACLE trigger syntax There are two types of triggers: after and before, The syntax for Oracle to generate database triggers is: Create [or replace] trigger name trigger time trigger event On Table Name [For each row] PL/SQL

Label:Sequence + trigger for Oracle PRIMARY KEY auto-incrementThe syntax format for a sequence is: CREATE SEQUENCE sequence name [INCREMENT by n] [START with n] [{maxvalue/minvalue n| Nomaxvalue}] [{cycle| Nocycle}] [{CACHE n| NOCACHE}]; INCREMENT by Used to define the step of the sequence, if omitted, the default is 1, and if a negative value is present, the values of the sequence are decremente

Pre-query Trigger in Oracle d2k/oracle FormsDescriptionFires during Execute query or Count Query processing, just before Form Builder constructs and issuesThe SELECT statement to identify rows that match the query criteria.Definition Level form or blockLegal CommandsSELECT statements, unrestricted built-insEnter Query Mode NoSee Also:define Custom Filter Using pr

effect. If the column value in new is modified in before, it can be seen in after. Statement trigger (statement-level trigger) and row-level trigger (row-level trigger) execution sequence: Of course, the overall sequence is to execute BEFORE triggers first, and then AFTER triggers. If the execution sequence of each